DETECTION APPARATUS, DETECTION SYSTEM AND LIGHTING CONTROL SYSTEM

摘要

PROBLEM TO BE SOLVED: To reduce incorrect detections of objects to be detected when carrying out a lighting control for example. SOLUTION: A pyroelectric sensor 104 is configured to detect infrared rays emitted by a human body and to output an analog detection signal 111. An amplifier circuit 105 is configured to amplify the analog detection signal 111 output by the pyroelectric sensor 104 and to output an amplified analog detection signal 112. A comparator circuit 102 is configured to compare the amplified analog detection signal 112 output by the amplifier circuit 105 with a threshold voltage and to output its result as a digital detection signal 113. A judging section 103 is configured to monitor the digital detection signal 113 output by the comparator circuit 102 at the interval of 10μs and to make such a judgement that the human body is detected when the digital detection signal 113 indicates the detection of a heat source five times successionally. COPYRIGHT: (C)2008,JPO&INPIT